Planning application
25 Birchen Grove, London, NW9 8RT
Works: Extension Loft or dormer Windows or glazing Domestic
Read from the description, not a valuation. How we read the register
Permission granted. Work must normally begin within three years of the decision or the permission lapses.
Proposal
Certificate of lawfulness for proposed hip to gable extension, rear dormer window with 3x front rooflights to the dwellinghouse.
As published by the council, reference 26/0301
Application record
- Reference
- 26/0301
- Type
- Certificate of Lawfulness - Proposed
- Status
- Decided
- Decision
- Certificate of Lawfulness - Granted
- Received
- 7 Feb 2026
- Validated
- 7 Feb 2026
- Decided
- 25 Mar 2026
- Ward
- Welsh Harp
- Decision by
- Delegated Team Manager
- Postcode
- NW9 8RT
Timeline
Dates from the published record
-
7 Feb 2026
Received by Brent
-
25 Mar 2026
Decision issued: Certificate of Lawfulness - Granted
-
10 Aug 2026
Added to PlanIndex
Who's behind it
Company information only, from the register and Companies House
Agent on file, a construction firm registered in Thame
23 applications on PlanIndex · across 10 councils · 88% granted
Trade members see who it is, their full track record, and every application they have filed.
See who's behind itDocuments
Plans, drawings, consultee responses and the officer's report
5 documents on file for this application
A planning file usually holds the application form, drawings and site plans, consultee responses, the officer's report and the decision notice.
Trade members open them from here.
Open the documentsWhat a grant of permission means
The process from here
Permission has been granted, usually subject to conditions listed on the decision notice, some of which must be discharged before work starts. The decision notice on the council portal sets out exactly what was approved.
Work must normally begin within three years of the decision or the permission lapses. Neighbours cannot appeal a grant; challenging one means judicial review of how the decision was made, within tight time limits.
About lawful development applications
How this application type works
A lawful development certificate is a legal determination, not a planning judgement. It asks the council to confirm either that existing use or works are lawful, often through the passage of time, or that a proposal would not need planning permission at all. The applicant must prove the facts; the merits of the scheme are not considered.
Nearby applications
Within 500 metres
-
35 Birchen Grove, London, NW9 8RT
Demolition of side garage and existing rear extension and proposed single storey side and rear extension, hip to gable extension, rear dormer window with Juliet balcony and 3x front rooflights to front roofslope of the dwellinghouse (Revised Description).
Granted Householder Extension Loft or dormer +2 12 docsSmall domestic -
15 Birchen Grove, London, NW9 8RT
Prior approval for a single storey rear extension to dwellinghouse, in metres: Extending beyond the rear wall of the original house - 6m Maximum height - 3.25m Eaves height - 3m
Granted Prior approval Extension 8 docsSmall domestic -
20 Old Church Lane, London, NW9 8TD
Proposed installation of new first-floor front opening with timber window and replacement of all front uPVC windows with timber windows to dwellinghouse (amended description)
Granted Householder Windows or glazing 13 docsDomestic -
84 Birchen Grove, London, NW9 8SA
79% historically approved · decision due ~17 Aug
Proposed dropped kerb for vehicular access and provision of 1x off street parking space to the fr...
Decided -
42 Birchen Grove, London, NW9 8SA
Construction of outbuilding and hardstanding with associated increase in ground levels to rear garden of dwellinghouse.
Granted Householder 8 docsSmall domestic -
42 Birchen Grove, London, NW9 8SA
83% historically approved · decision due ~11 May
Variation of condition 2 (Approved Drawings) to allow increased set back and increase in roof height to two storey side extension of Householder application reference 25/0165 dated 23/05/2025 for Demolition of garage/side extension and erection of a single and two storey side and rear extension, rear dormer window and roof extension to dwellinghouse.
Awaiting decision Amendments Extension Loft or dormer +2 9 docsDomestic
Other lawful development applications
In Brent
-
26/0783 Granted
3 Hamilton Road, London, NW10 1NU
Certificate of lawfulness for existing single-storey rear extension to dwellinghouse
-
26/1946 Awaiting decision
120 Gladstone Park Gardens, London, NW2 6RL
Certificate of lawfulness for proposed rear dormer extension with Juliet balcony, hip to gable roof extension, installation of 1x window to side elevation and 2x front rooflights to dwellinghouse.
-
26/1208 Granted
50 Ballogie Avenue, London, NW10 1TA
Certificate of lawfulness for proposed rear dormer extension, hip to gable roof extension, alteration to fenestration and installation of rooflights to the dwellinghouse
-
26/1015 Refused
5 Midholm, Wembley, HA9 9LJ
Certificate of lawfulness for proposed installation of solar panels to the side and rear roofslope of the dwellinghouse.
-
26/1176 Refused
47 Barn Rise, Wembley, HA9 9NH
Certificate of lawfulness for proposed single storey outbuilding in rear garden of the dwellinghouse.